Cutting mechanism for wrapping machines



Feb. 14, 1928.

1,659,159 G. w. PROUTY CUTTING MECHANISM FOR WRAPPING MACHINES Filed Jan. 11. 1924 2 Sheets-Sheet l (Lax? ATT RP' YE- Feb. 14, 1928. 1,659,159

' G- W. PROUTY CUTTING MECHANISM FOR WRAPPING MACHINES Filed Jan. 11. 1924 2 Sheets-Sheet 2 ATT RN YF;

sequent readjustment of CUTTING MECHANESM 'EGR Application filed Januar This invention relates to wrapping chines oi the general type shown and described in my prior application for Letters l atent filed June 21, 1921, and adapted primarily for Serial No. 479 410,

wrapping annular objects, such, for example, as automobile tires, coils of wire, etc.

A machine of support by which is gradually turned, an

this type comprises a work the object to be wrapped annular shuttle which is rotated about the work asthe latter is moved therethrough, a reel or the likeremoved from the shuttle for latter wrapping material i continuous strip which is w shuttle as the latter is rota the strip of wrapping cient quantity thereoi ha supplying to the n the form of a rapped about the ted to wrap said.

. ti ip about the work, and means between the shuttle and the source of supply :tor cutting material alter a suihs been wrapped upon the. shuttle to complete the wrapping (it a given object.

The present invention relates to the strip cutting mechanism of machines oi this type and has tor justed in accordance oi the work. ably provided operate during p ins; operation its object to whereby this mechanism may with the requirements Said mechanism is also preferwith means for automatically resetting the same after the cutting-opera tiou so as to leave the parts in condition to the next succeeding wrapwithout attention on provide means be readily adthe part oi the operator except when the character of the work is so changed as to or less length of wrapping with means w carried into effect, will best be require a greater strip and a conthe mechanism.

objects of the inhereby the understood from the following description of one term or embodime trated in the accompanying will be understood however,

and have ticular construction scribed and shown illustrative purposes merely, and that the inthe claims hereunto vention, as defined by appended, may be otherwis out departure from its spiri In said drawings: Fig. 1 is a front elevatio nt thereof illus drawings. it that the pararrangement debeen chosen for e practised witht and scope.

n of a wrapping machine having cutting mechanism embodying the invention.

shown comprises a base 15 (l-EDHGE W. lPIt-OUTY, OF BOSTO COMPANY, OF BOEBTON,

N, MASSACHUSETTS, ASSEGITOR TO TEBKE'LSEN MACHINE MASSAGEUSETTS, A COHPURATIQN 0i? MASSACHUSETTS.

VJBAETENU: MACHINES.

y 11, 1924. Serial no. 685,716.

Qis anenlarged ii'ront elevation of said cuttingmechanism.

is a section on the line'33, Fig. 2.

Fig. 4 a section on the line ll, Fig. 3. ihelianie oil? the wrapping machine herein and a yoke 16' which is pivotally mounted on a shaft 17 journa-ll'ed in an upright 18 rising from the base 15. The yoke is provided with guide rollers 19 'for an annular shuttle 20 which is rotated by a driving member in the form of a friction disk 21 secured to the shaitl'? and driven (through connections not shown in detail) from an electric motor 23. The wire coil or other work Til to be wrapped is held by a weighted roller let upon work supporting rollers 24 (only one of which is shown in Fig. 1) which are driven, through connections generally indicated at 25,1from the motor 23, the arrangement being such that the work TN will be turned relatively slowly with respect to the speed of rotation of the shuttle 20. Said shuttle is formed with a hinged segment fiii nornially closing a gap through which the work VJ may be in serted, while theyokc 16 may be adjusted about the axis of the shaft l'i'to center the shuttle 2O w'threspect to annular objects of diilerent sizes, said yoke being counterbalanccd by a spring 2? and being locked in adjusted position by meanso'l' a clamp 28 on an upright 29 rising from the base 15. The wrapping material, preferably in tllGfOI'lll of a continuous strips of paper, is from a roll 30 carried by the yoke 16 and from which said paperpasscs over a guide plate to the shuttle 20, Said shuttle 20 comprises an annulus having on one face a circular series of rollers about which the strip is wrapped when the shuttle is rotated, said strip being fed from the shuttle about a guide roller 36 to the work W. Between the shuttle 20 and the source of supply 30 there is provided a cutting mechanism comprising a knite 37 co-operating with a portion olthe guide plate 34 to sever the strip S when a sufticientlength thereof has been wound around the shuttle rollers 35 to complete the wrapping of the work W. The knii e 37 is automatically actuated, as hereinafter more iully explained,"after a predetermined number ofrotations of the driving disk 21, by controlling mechanismactuated at each rotation of said driving disk by a supplied I lit) lit

cam projection thereon, said controlling mechanism being manually adjustable in accordance with the size of the articles wrapped.

From the foregoing, the purpose, relative location, and function of the several instrumentalitics of the machine will be suilicicntly understood tor the purpose of the present case. With the exception of the cutting and controlling mechanism, and in so far as the other partsentcr into combination therewith, as pointed out in the claims, the latter parts may be of any suitable construction and arrangement.

The cutting and controlling mechanism constituting the present invention, as herein shown, is constructed and arranged as follows :-Mounted in an opening in a suitably disposed boss 4-5 on the yoke 16 is a bushing in which is journalled a shaft ll to the forward end of which is secured, asby a nut 49, a ratchet wheel 42. A second ratchet wheel i3 is mounted on the exterior of the bushing 40 at the forward side of the yoke 16 and is secured in lined position to the latter by pins 44, the teeth ofsaid ratchet wheel 43 being oppositely disposed with respect to those of the ratchet wheel 1-2. R0- tatably mounted on the bushing 40 between the ratchet wheels 42 and 43 is an adjusting member 46 having an operating handle 47 by means of which said membermay be turned into any desired angular position of adjustment. Said adjusting member is provided with a pawl 18 co-operating with the ratchet 43 for locking said adjusting member in adjusted position, and is torined with'a shoulder 50 constituting a stop which is engaged by a pin 51 on the ratchet wheel 42 to determine the initial or starting position of the latter in accordance with the adjustn'icnt of the parts. Surrounding the rear end of the shaft 41 is a torsion spring 52 secured at one end to a head 53 on said shaft and at its opposite end to the bushing 40, said spring tending normally to turn the ratchet wheel 4-2 in a counterclockwise direction, as shown, to cause the pin 51 to engage the shoulder 50. The knife 37 is carried by an arm 54 on a hub 55 mounted to turn on a stud 56 projecting from the yoke 16, said hub having a second arm 57 which is engaged by the pin 51 on the ratchet 12 when the latter is turned in a clockwise direction to actuate said knife. The ratchet 1-2 is progressively rotated during the wrapping operation by means of a pawl 58 on one arm of a bell crank 59 pivoted at 60 to the yoke 10 and the other arm (31 of which is provided with a cam roller 62 cooperating with the cam projection 39 on the shuttle driving disk 21, whereby said ratchet wheel is advanced one tooth in a. clockwise direction for each rotation of said driving disk. Said ratchet is held in its advanced the pawl the arm 57.

position after each actuation by 58 by a detent pawl 63 carried by The pawls 48, 58 and G3 are normally held in operative engagement with their respective ratchets by means of springs (is, (55 and 66, respectively. The hub 55 is provided with a projecting linger 67 which engages a pin 68 on the pawl 58 to release the latter whcnthe knife is actuated, the pawl 63 being simultaneously released by a pin 09 on the arnr57.

In operation, the pawlxlti is manually released, and the adjusting member 46 positioned, by means of the handle 42?, in accordance with the amount otwrapping material required for the work to be wrapped, being held in adjusted position by engagement of said pawl 48 with the fixed ratchet 43. l r'hen the machine started, the controlling ratchet 42 is progressively moved, tooth by tooth, in a clockwise direction, by the pawl 58, moving the pin 51 away from the shouldcr 50 and eventually bringing the same into engagement with the arm 57, alter a number of rotations oi the shuttle depending upon the initial adjustment of the adjusting member 1-6 and shoulder 50. Engagement oi. the pin 51 with the arm 57 causes the knife 37 to be depressed. to sever the strip ti W'hen said knife is so operated, the finger (3T disengagcs the pawl 58 from the ratchet 4-2, while the pin 69 simultaneously disengz'igcs the pawl 63 from said ratchet, permitting the spring 52 to turn the latter in a counter-clockwise direction until the pin5l engages the stop 50, thereby positioning the parts or a second operation. No further adjustn'lcnt out the parts is required. so long as a succession of articles of the same size is to be wrapped, but when the machine is to be used in connection with articles of a diilerent size, the adjusting member 1-6 will be again adjusted in accordance with the amount of wrapping material necessary for the latter.

Having thus described my invention, l' claim:

1. In a machine of the class described, in combination, means for supporting and moving the work to be wrapped, a shuttle, means for rotating said shuttle about the work, means for feeding a strip of wrapping material to said shuttle, and mechanism, including a member progressively moved toward operative position by said shuttle rotating means, for cutting said strip.

2. In a machine of the class described, in combination, means for supporting and moving the work to be wrapped, a shuttle, means for rotating said shuttle in a constant plane about the work, means for feeding a strip of wrapping material to said shuttle, nleans for cutting said strip, and means operated by said shuttle rotating means {or controlling the time of operation of said cutting means.

Hit)

3. In a machine of the class described, in combination, means for supporting and moving the work to be wrapped, a shuttle, means for feeding a strip of wrapping ma terial to said shuttle, a driving disk for retating said shuttle, a cam projection on said driving disk, and mechanism actuated by said cam projection for sever ng the strip of wrapping material.

4:. In a machine of the class described, in combination, mechanism tor feeding a strip of wrapping material to the work and wrapping the same thereabout, controlling means progressively moved by said wrap ping mechanism during the wrapping. op-

eration, means automatically operated when said controlling means reaches a predetermined position for cutting said strip, and means for reversing the path of movement of said controlling means. j

5. In a machine of the class described, the combination of a shuttle, means for retating said shuttle to wind a strip on the work, means for guiding the strip to the shuttle, a strip cutting device, and mechanism movable in one direction for operating said device at a predetermined time and thereafter movable in the opposite direction into starting position.

6. In a machine of the class described, in combination, mechanism for feeding a strip of wrapping material to the work and wrapping the same thereabout, means for cutting said strip at a predetermined time, and mechanism for controlling the time of operation of said cutting means including a member progressively moved by said wrapping mechanism during the wrapping operation, an adjustable stop to determine the position from which said member is moved, and means for retracting said member to said position after the cutting operation.

7 In a machine "of the class described, in combination, mechanism for feeding a strip of wrapping material to the work and ter, a pawl operated by wrapping the same thereabout, aeutter for cutting said strip at a predetermined time, aratchet having a stud to operate said cutsaid wrapping mechanism for periodically advancing said ratchet, a holding pawl for said ratchet, devices operated by said cutter for releasing said pawls, a spring for returning said ratchet to its initial position when said pawls are released, a stop engaged by said stud to determine the initial an adjusting member by which said stop is position of said ratchet,

carried, and means for locking said adjusting member in adjusted position. 8. In a machine of the class in combination, mechanism :tor feeding a strip of wrapping material to the work and Wrapping the same thereabout, a cutter for cutting said strip at a predetermined time, a ratchet having a stud to operate said cutter, a pawl operated by said wrapping mechanism tor periodically advancing said ratchet, a holding pawl for said ratchet, devices op cutter for releasing said erated by said pawls, a spring "tor returning said ratchet to its initial position when said pawls are released, a stop engaged by said stud to de termine the initial position of said ratchet, an adjusting member by which said step is carried, a fixed ratchet, and a pawl carried by said adjusting member and co-operating with said fixed ratchet to lock said adjusting member in adjusted position.

9 In a machine of the class described,'

the combination of revoluble means for winding a strip about thework, means for rotating said means, a stripcutting device, a rotatable member carrying means for actuating said device, and means for intermittently rotating said member during the rotation of said winding means into position to actuate said cutting device.

In testimony whereof I aiiix my signature.

GEORGE l/V. PROUTY.

described, 

